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Phys. Rev. Lett. 104, 020601 (2010) [4 pages]

Geometric Stochastic Resonance

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Pulak Kumar Ghosh1, Fabio Marchesoni2,1, Sergey E. Savel’ev3,1, and Franco Nori1,4
1Advanced Science Institute, The Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama, 351-0198, Japan
2Dipartimento di Fisica, Università di Camerino, I-62032 Camerino, Italy
3Department of Physics, Loughborough University, Loughborough LE11 3TU, United Kingdom
4Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1040, USA

Received 17 July 2009; published 14 January 2010

A Brownian particle moving across a porous membrane subject to an oscillating force exhibits stochastic resonance with properties which strongly depend on the geometry of the confining cavities on the two sides of the membrane. Such a manifestation of stochastic resonance requires neither energetic nor entropic barriers, and can thus be regarded as a purely geometric effect. The magnitude of this effect is sensitive to the geometry of both the cavities and the pores, thus leading to distinctive optimal synchronization conditions.

© 2010 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.104.020601
DOI:
10.1103/PhysRevLett.104.020601
PACS:
05.40.-a, 05.10.Gg
 
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